Internal medicine and primary care at Wellhaven Medical Clinic in La Mesa draw on Dr. Kourosh Khamooshian's UCLA-affiliated training through the David Geffen School of Medicine's Kern Medical Center residency program, located on Grossmont Center Drive near Sharp Grossmont Hospital. He earned his medical degree from Kermanshah University of Health and Medical Sciences in 1998, completed an internship at Brookdale University Hospital and Medical Center, and holds American Board of Internal Medicine certification, with his Grossmont Center Drive suite situated in the same Grossmont Medical Plaza complex that houses multiple specialty practices. A Clinical Associate Professor at Eisenhower Medical Center since 2015, he brings an academic medicine perspective to community-based primary care in East County. Humanitarian service as a volunteer Chief Medical Officer treating refugee populations in Istanbul adds international-medicine experience to the practice's clinical foundation, and musculoskeletal complaints in his internal-medicine panel generate referral coordination with La Mesa Spine Center for conservative spinal management. The practice's highest-complexity services include hospital-medicine-grade workups for dehydration, cachexia, and unexplained weight loss, alongside UTI treatment protocols resistant to first-line antibiotics and multi-organ system evaluation using comprehensive metabolic and hematologic panels.